After a group of friends graduate from Delhi University, they listlessly haunt their old campus, until a British filmmaker casts them in a film she's making about freedom fighters under British rule. Although the group is largely apolitical, the tragic death of a friend owing to local government corruption awakens their patriotism. Inspired by the freedom fighters they represent in the film, the friends collectively decide to avenge the killing.

Dr. Vaseegaran creates Chitti, a powerful robot in his own image, but it is rejected by the scientific body AIRD due to its lack of human behaviour and emotions. After a lightning strike triggers emotions in Chitti, he begins to develop human-like feelings. However, Chitti falls in love with Dr. Vaseegaran's fiancée, Sana, and turns against his creator, leading to dangerous consequences.

A man suffering from anterograde amnesia as a result of a violent attack in the past sets out to avenge his girlfriend's death with the aid of photographs, notes and tattoos all over his body.